Relieving mechanism for engine-lathes.



PATENTED NOV. 12, 1907.

H. BAERBALGK. RELIEVING MECHANISM FOR ENGINE LATHES.

APPLIOATKON FILED FEB. 3. 1906.

KSHEETEFSKERT 1,

witnesses.

PATENTED NOV. 12, 1907.

H. BAERBALGK. RBLIEVING MECHANISM FOR. ENGINE LATHES.

AYPLIUATION I'lL'ED T1333. 1906.

8 SHEETS-SHEET 8.

' m ihxej s25, Hans Baerbalck in 1/9 nful,

whitish srsrri s i srmrr OFFICE HANS BAERBALOK, OF HAMILTON, OlllOfASSUi-ZNOR TO THE HAMILTON MACHINE TOOL OOlliPANY, Oi! HAMILTON, OHIO, A CORPORATION OF OHIO.

RELIEVING MEGHANISM FOR ENGINE-LATHES.

Specification of Letters Patent.

Patented Nov. 12,1907.

Application filed February 3! 1908. Serial No. 2993925 Toall whom it may concern:

Be it known that I, HANS BAERBALCK, a citizen of Germany, residing at Hamilton, Ohio, have invented a new and useful Improvement in Relieving Mechanisms for Engine-Lathes, of which the followirg is a specification. i Y

My invention relates to relieving mechanisms for engine lathes, of the class adapted for turning fluted reamers or other tools with relieved cutting edges, and the objects of my improvement are to provide means to reciprocate the tool carrier in different horizontal angles of adjustment; to adjust the tool carrier in the direction of its reciprocating movement; to provide means to antomatically 'advance'or retard the movement of reciprocation oi the tool carrier in relation to the speed of rotation of articles to be turned to register with a predetermined helical line thereon; to provide adjustable means to adapt the attachment to relieve thrcutting edges of either straight or tapered articles having a predetermined nurnber of either straight or helical flutes, and to adapt the mechanism to a wide variety of engine lathes. These objects are attained in the following described manner as illustrated in the accompanying drawings, in which Figure l, is a plan of portions of an engine lathe ombodying my improvement; Figs. 2 and 3, longitudinal sections respectively on the lines a-a, and b-b of Fig. 1; Fig 4, a transverse section on the line c*c of Figs. 1 and 2; Fig. 5, a plan with parts broken away and parts in section'of the speed changing gears, the rear portion of the carriage, and of the taper attachments; Fig. 6a side elevation of the quadrant arm; and Fig. 7, a vertical section on the line of shaft 38 looking from the rear.

In the drawings, 1 represents the shears of an engine lathe, 2 the tool carriage mounted thereon and provided with sliding plate 3 which carries nut 4 in engagement with the transverse iced screw 5 for adjusting said plate longitudinally on the carriage. The front end portion of. said screw is spline-d in sleeve 6 which is journalcd in the front wall of the carriage and provided with handle 7. Rotative plate 8 is pivotally mounted on sliding plate 3 and secured in rotative adjustment thereon by means of clamping bolts 9 whose heads are movable in a circular tee groove 11 formed in the sliding plate there under.

Plate 12 mounted to reciprocate longitudinally between guides 13 formed on the rotative plate is formed with an opening 14 in its rear end over the center of tho ,rotative plate and with depending lug 15.

Bolts 16 adjustably secured in the front wall of the rotative plate are extended loosely through respective openings formed in lug and each provided on the rear end with a fixed collar 17.

)oiled springs 18 compressed between the lug and the collars encircle the respective bolts 16.

Carrier 19 formed with a transverse tee slot 21 for the tool post (not shown) is mounted on the rotative plate to slide parallel with plate 12 and directly thereover. Said carrier is secured to and longitudinally adjustable on said plate by means of auxiliary ieedscrew 22 being journaled in the front wall of the carrier and adjustably engaging with nut 23 carried by the plate.

Vertical shaft 24 engaging with driven shaft 29 by organs of miter gears 26 is journaled in the axis of the rotative platel Gain 27 is removably keyed thereon to rotate within opening l4 f0rmed in plate 12. Nose 28 is rcrnovably secured to said plate within the rear side of the opening therein by means of screws 29. The yielding exertion of springs 18 on lug 15 main tains the plate with said nose in continuous contact with the face of the cam in its rotation. The action of the cam on the nose moves plate 12, together with the tool carrier gradually in a rearward direction until the highest point of the cam is passed, when the action of the springs reciprocates them quickly in the opposite direction. Said driven shaft is journaled in bearing 31 formed on the under side'of sliding plate 3, and also in sleeve 32 mounted in carriage 2 and is movable longitudinally with said sliding plate.

Long spiral gear 33 splincd on the projecting rear portion of shaft- 25, meshes with a similar short spiral gear 34 which is secured on sleeve 35. Said sleeve is journalcd in a bearing 36 formed in the extended rear portion of carriage 2, and is prevented from longitudinal movement therein by means of the spiral gear 3 1 and the collar- 37 being secured on its opposite ends in Contact with said bearing. Driving-shaft 38 parallel with the shears is splined in said sleeve and journaled near one end in bracket 39 which projects rcarwardly from the lathe bed. Gear 41 secured on said shaft is driven from the back gear (not shown) of the lathe at predetermined speeds through the intormcdiate removable and interchangeable speed changing gears 42 which are carried on quadrant arm 43 whereby they may be maintained in adjusted engagcmcnt with the said back gear in the ordinary manner.

Guides 44 and 45 pivotally secured at one end on bracket 46 which projects rearwardly from the lathe bed, are independently adjustable at the other end in different horizontal angles on opposite sides of plate or bracket 47 which is projected rearwardly from the lathe bed opposito the head stock (not shown) thereon. Bolts -18 movable in slots 49 serve to maintain said respective guides in adjusted angularpositions. Slides 51 nd 52 movable longitudinally along the respective guides are each pivotally secured to corresponding transverse carriage slides 53 and 54 which are longitudinally movable in respective channels 55 and 56 iormed in the extended rear portion 57 of the carriage 2.

Carriage slide 53 carries a raised bearing 58 wherein perpendicular to the surface of tapered articles in the the rear end of the transverse feed screw 5 is sivivelcdi or in a line at any horizontal angle to the axis of terfering with its rotative movement by means of sleeve Having fully described my improvement, whm; 6 wherein it is splinedclaim as my invention and desire to securel y Letters Carriage slide 54 is provided with a bracket or yoke Patent of the United stateslisf p 59 which spans the spiral gear 33 lengthwise and controls its 1011 it 1 r I t 1 1. In a lathe, a carriage, a tool carrier thereon a driven g u PO51 Ion m m ion 0 splm gear short, means mechanically connected therewith tor recip- 3ft regardless of the longitudinal movement of driven rocuting the carrier, 3 driving shaft, spiral gears engaging shaft 1 9 1 i1; is p1i ed the driven shaft therewith, and means constructed and er- When the guides 44 and 45 are parallel with the move- "angled to be actuated by the movement of the Carriage I 1 for shifting one of said gears longitudinally in relation to merit oi the carriage on tile shears, the carriage slides the 0th y be ilmnovably Secured to the carriage y means of 2. In a lathe, the combination of a driving slinft, a bolts being inserted through holes 61 formed in the carriage provided with a tool carrier, a driven shaft C111 8' rear d O the Slides and holes 62 formed to register ried by the carriage and adapted to be actuated at predetermined speed hy'the di'lVlil" shaft means mechanically q o 2 F i B I 1 thenwlth though the mobs 63 the Cal-nage connected therewith for reciprocating the tool carrier, and extension. inenns constructed and arranged to be actuated by the In operation, the movement of sliding plate 3 for movement of the carriage for varying the speed of the turning tapering articles is controlled in the usual mandrive" Shaftner by the ad usted angle oi guide 44 to the direction l In I lathe combination of f i 'i i a (all A 5 h 1 grd 51 ridge movable paiallettllereurth and piovldeii with a too P mllvcment Cunagefm t 9 l l 1 9 carrier, a driven shaft carried by the carriage, means in guide 44 carries Carriage slide 53 which controls the mechanically connected with the driven shaft for reciprol it di l t f transverse f d 5 i eating the tool carrier in synchronism therewith, gears a 'n he driving with the driven shaft and means eled in be I r 1 (onnectins t 7 l b 08 thereon s1 dmg plate 3 bel ad constructed and arranged to be actuated by the movement lustably secured on Sald teed screw by means of mu 4 of the carriage for changing the speed of one of said shafts riage slide 53 from slide 51 or adjusting guide 44 parallel is longitudinally movable thereby together with the in relation to the other. rotative plate th reon, 4. In a lathe, the combination of a carriage provided For turnin Strainht articles carriao slide 53 mm be with :1 tool carrier, a driving shaft, adriven shaft actug c be y nted thereby and movable with the carriage, connections unmova'bly secured to the carriage the inset-m0? of with the driven shaft for moving the tool carrier, and a bolt or Inn through holes 61 and 62 in the respec iv me'ans constructed and arranged to be actuated by the slide and carriage and either disconnecting said can movement-of the carriag f changing the Speed of the driven in relation to that of the driving shaft.

5. ,'Llie'coinbination of a tool carrier, a driven shaft, wlth the movement of the Carriage means actuated thereby adapted to reciprocate said car- I y means of the Speed g g gears 42 a y desired rier, a driving shaft, spiral gears adapted to transmit mopredetermined speed of driving shaft 38 may be selion therefrom to the driven shaft, and means adapted to cured and transmitted toitlie cam 27 through the spiral one of Sam geflrs Iongltudllmny f relation to the e other to effect a variation in the relative speeds of the gears 34 and 33, sliaits 20 and 24 and miter gears 26. Shafts Dunn? each rotatlon OI the by {reason of con- 6. in a lathe, the combination of a driving siiatc, spiral I met Wlth 11059 P a 12 together Wlth the Carmel 19 gears arranged to be actuat'edthcrebmncarriage provided is gradually moved in a rearward direction and quickly with a tool cavi'iery means actuated by said spiral gears returned by the action of Springs 1 The mtative from the driving shaft for reciprocating the tool carrier at a predetermined i-ythin, and means constructed and arspced 0t efliher the Eli-might tapmcd allude to ranged to be i'ictuated by the IHOVGiP-GHtOf the cliri'iage for 1 5 turned should be so predetermined that the successive changing theqielafive position Of the spiral gears in pan straight flutes thereon shall register in time with the allel planes, whereby the i-ythm of movement of the tool return movement of plate 12 and that the gradual adis y m 7. In a lathe, the combination of a carriage provided Vance of the tool by the i OI the may with a tool carrier, and with a. driven shaft, a driving 20' between the flutes to rellcve Cuttmg edges 1 y shaft, spiral gears connecting the driven shaft therewith,

gradually deepening cut behind them. means actuated by the driven shaft for reciprocating the Forrclieving the cutting edges of straight or tapered carrier in s'ynchwnism with the driving shaft, ms

articles having helical or spiral flutes, the additionalmum's constructed i arranged be actuated by movement of the carriage for changing-the relative posiadjustment required of guide 45 at Such angle to the tion of the gears in iiu'allel planes, whereby the movement shears as will-cause the yoke on the carriage slide 54 to of the carrier; will be changed in relation to thejspeemor move the long spiral gear 33 longitudinally on driven the dl'lvlng shaftshaft 25 in-relation to spiral gear 34 in continuous mesh a lathei the "P of carnage Provided l 0 l 1 1 v f 1 Wlfill a tool carrier, :1 driving shaft, spiral gears actuated t Wmg to t Opposite 0 t teLt tliei'ehy, means mechanically connected with said gears for of said spiral gears at their points of Contact any longlmoving the tool carrier, and means constructed and ar- ',tudinal movement of one gearin relation to the other ranged to be actuated y the movement of the Carriage for changing the relative speed of said gears.

\Fill varv the rclativo'specd of rotation 01' driven shaft 5). In a lathe, a carriage provided with a tool carrier r 1 i i 1 20 and the (.am 27 (liiXLll thcrchyniiom the speed of and with a drive shaft, means mechanically cnnnected driving Slliiii? 33. The MICOlOlzItiOIl 01' retardation in with the driven shaft for reciprocating the carrier, a driv the time of the reciprocation of plate 12 thus obtained s t, p r gears engaging t driven sha th m may be regulated to correspond with the pitfll 0f the with, and means constructed and arranged to be actuated by the movement of the carriage for shifting one of said i i spnal flute Much to f gears longitudinally in relation to the other said gear.

The low-two Plate y be mmlilvely adluswd to 10. in a lathe, a carriage, a driving shaft parallel there cause the reciprocation of, plate 12 to occur in a line with, a spiral gear spliiied thereon and movable with the carriage, a giilde connected to the lathe beq and adjustable in different angles to said shaft, a slide movable therein; with the carriage; a spiral gear curried thereby parallel with the guide and engaging with the former gear, a driven shaft splin'ed therein and carried with the carriage. a tool holder, anti com ons from the driven shut't to move the tool holder.

11. In a lathe a. di'lvlng shaft, a lathe ear-ridge movable parallel therewith, a short spiral gear spllned on said shaft and movable with the carriage, a driven shaft carried with the carriage, a long spiral gear splined thereon and engaging with the said short gear, a guide secured to the inlhe hell and adjustable in different angles to the driving shaft, a slide movable therein with the carriage.

a connection from said slide to the long, spiral gear, said 15 

